Only create CF routes if they don't exist
Only create CF routes if they don't exist

In the newer CF CLI versions (>=v6.33.1) they started to return with an error
if the route with a given path exists so we have to check it first.

Strangely if you try to add an existing route without a path but with a
hostname it doesn't error.

alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf